Effects of static attitude and three different motions on vortex behavior and its breakdown over delta wings have been investigated. These motions include 1) harmonic oscillation or ramp-and-hold motion in roll at constant resultant angle of attack, 2) harmonic oscillation or ramp-and-hold in pitch and 3) coning at constant resultant angle of attack A basic 65° delta wing configuration was test...

Abstract The present study aims investigating experimentally wing/blade geometries in which the leading edge is modified by presence of artificial bumps, following examples nature (“biomimetics”). Specifically, tubercles observed humpback whales are considered with a special focus on easy manufacturing and performance improvements, trying to overcome lift coefficient reduction before stall comp...

This paper is an attempt to prove the following result:Let $n>1$ be an integer and let $mathcal{R}$ be a $n!$-torsion-free ring with the identity element. Suppose that $d, delta, varepsilon$ are additive mappings satisfyingbegin{equation}d(x^n) = sum^{n}_{j=1}x^{n-j}d(x)x^{j-1}+sum^{n-1}_{j=1}sum^{j}_{i=1}x^{n-1-j}Big(delta(x)x^{j-i}varepsilon(x)+varepsilon(x)x^{j-i}delta(x)Big)x^{i-1}quadend{e...

The influences of V-shaped delta-wing baffles on the thermohydraulic performance characteristics in a round tube were experimentally tested. having set number wings (N = 4, 6, and 8) comparatively with various pitch ratios P/D 2.0, 2.5, 3.0 thoroughly fitted inside tube. In present work, responsible for both recirculation/reverse flow behind solid baffle longitudinal vortex wing. winged N 8 pro...

Abstract From arsenal delivery to rescue missions, unmanned aerial vehicles (UAVs) are playing a crucial role in various fields, which brings the need for continuous evolution of system identification techniques develop sophisticated mathematical models effective flight control. In this paper, novel parameter estimation technique based on filter error method (FEM) augmented with particle swarm ...